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11-15-2009, 04:41 AM   #1
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Sigma 100-300mm

Hi Guys, need your help:
Has the Sigma 100-300 mm F/4 EX DG APO IF Pentax AF, HSM? I know the lens support HSM on the Nikon body.

11-15-2009, 05:17 AM   #2
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QuoteOriginally posted by The Riddler Quote
Hi Guys, need your help:
Has the Sigma 100-300 mm F/4 EX DG APO IF Pentax AF, HSM? I know the lens support HSM on the Nikon body.
No it is not HSM for Pentax.
11-15-2009, 05:22 AM   #3
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HSM is only available for Sigma, Canon and Nikon D mounts.
Sigma - Lenses

Cheers.
11-15-2009, 08:08 AM   #4
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I have a Sigma 100-300 and although it is not HSM, its focusing is very fast. It is one of my fastest focusing lenses - faster than the Pentax 60-25 which has HSM. I think that the internal focusing design of the Sigma really helps.

11-15-2009, 09:03 AM   #5
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here is a chart with Sigma lenses and what features are present on what mount. There is also a link to a table for some discontinued lenses as well:

Sigma - Lenses - Lens Chart
11-15-2009, 09:32 AM   #6
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No but the lens itself is so good I don't use my DA* 60-250mm any longer.
11-15-2009, 05:47 PM   #7
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it's a great lens. I was considering of getting one before I got the 55-300. but eversince I got the 55-300 which is a very good lens and very capable of producing some outstanding photos, I don't think that the f4 aperture speed is worth the additional 700 bucks. I think you are better off spending that extra cash on another lens.
11-15-2009, 05:58 PM   #8
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Shots from the Sigma 100-300 f4:

(all at 300m f/4 or f/5)








11-16-2009, 06:32 AM   #9
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QuoteOriginally posted by Pentaxor Quote
it's a great lens. I was considering of getting one before I got the 55-300. but ever since I got the 55-300 which is a very good lens and very capable of producing some outstanding photos, I don't think that the f4 aperture speed is worth the additional 700 bucks. I think you are better off spending that extra cash on another lens.
Actually, having owned the 100-300 I can say, if you want a tele zoom and are really wanting the best images you can get, all you need to do is look at jsherman's shots and anywhere on any mount to see the 100-300 f4 is one of the few lenses out there worth every penny that it costs over the 55-300, but only if you have those pennies. It will rival primes and in many cases exceed them in IQ and resolution.

There is little doubt the 55-300 is a wonderful lens and a fair, though not a great value as it once was due to the price increases. I loved the Canon lens which fit the same niche in their lineup...the EFS 55-250 which had the newest, at the time, 4-stop IS but lacked ring USM and still was quiet and quick to focus. Then I splurged on the 100-300 and there was no contest nor was there any desire to go back to the 55-250. Ironically it was a week after I bought the lense that I decided to switch to Pentax.

For me the 55-250 was a budget decision that worked out very well, and from everything I see the 55-300 is the same deal only about $120+ more expensive than the Canon lens so it's not the deal it could be.

For me my dilemma is deciding between the 60-250 and the 100-300...I seriously have a hard time there but on IQ, I would choose the 100-300. But the SDM and sealing of the 60-250 are big pro's in that direction and the IQs are very close.

I would say that if the 55-300 was a WR lens but at the same price, I probably would buy one as an interim lens and know I would be getting a lense with excellent IQ that is pretty light weight and nice as a casual walk around tele zoom.
11-17-2009, 07:07 AM   #10
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Ok thanks a lot for the answers: is the sigma lens 100-300mm Apo f4 a full frame lens. So when pentax has a full frame body I can use this lens?
Very nice people here!!
11-17-2009, 02:36 PM   #11
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QuoteOriginally posted by brecklundin Quote
Actually, having owned the 100-300 I can say, if you want a tele zoom and are really wanting the best images you can get, all you need to do is look at jsherman's shots and anywhere on any mount to see the 100-300 f4 is one of the few lenses out there worth every penny that it costs over the 55-300, but only if you have those pennies. It will rival primes and in many cases exceed them in IQ and resolution.

There is little doubt the 55-300 is a wonderful lens and a fair, though not a great value as it once was due to the price increases. I loved the Canon lens which fit the same niche in their lineup...the EFS 55-250 which had the newest, at the time, 4-stop IS but lacked ring USM and still was quiet and quick to focus. Then I splurged on the 100-300 and there was no contest nor was there any desire to go back to the 55-250. Ironically it was a week after I bought the lense that I decided to switch to Pentax.

For me the 55-250 was a budget decision that worked out very well, and from everything I see the 55-300 is the same deal only about $120+ more expensive than the Canon lens so it's not the deal it could be.

For me my dilemma is deciding between the 60-250 and the 100-300...I seriously have a hard time there but on IQ, I would choose the 100-300. But the SDM and sealing of the 60-250 are big pro's in that direction and the IQs are very close.

I would say that if the 55-300 was a WR lens but at the same price, I probably would buy one as an interim lens and know I would be getting a lense with excellent IQ that is pretty light weight and nice as a casual walk around tele zoom.
if not for the 1k pricetag, I would had certainly gotten the Sigma as well. it is one of the best lenses that Sigma ever produced. I just find it weird that some of the best FF-compatible Sigma lenses are discontinued. anyway, considering the price-tag, why not go for the BIGMA ?

speaking about the 55-300, I was able to produce one of the best photos I had with it as compared to my 18-55 WR kit which is until now struggling to get a better result that the telephoto zoom 55-300. I find it odd though considering that the 18-55 kitlens has a higher MTF result than the 55-300.
11-18-2009, 04:00 AM   #12
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Sigma 100-300 for full frame

QuoteOriginally posted by The Riddler Quote
Ok thanks a lot for the answers: is the sigma lens 100-300mm Apo f4 a full frame lens. So when pentax has a full frame body I can use this lens?
Very nice people here!!
To answer your first question: The Sigma 100-300 is indeed a full-frame lens.
To answer the second: Nobody knows but a lot of people think they do.

If you want to research the question, simply google "Pentax full frame dslr".

If you are going to read it all, I hope you are (a) a speed reader, (b) very young with a history of longevity in your familly, and (c) very tolerant.

Remember also that if Pentax does come out with a full frame camera and you buy it, you will need to invest in something like a 150-500 mm lens to get the same range as your 100-300, and you may also find that your 100-300 will lose some of the edge-to-edge sharpness that it has on your current camera.

This last is by no means certain, though. You will have to talk to someone who has actualy used the lens on a full-frame camera - unfortunately (?), that won't be a Pentax shooter unless he shoots film. No doubt you could find samples of the Sigma 100-300 performance on a full frame digital camera on a Canon or Nikon forum. It won't tell you precisely what you will get, but it will be close.

Best of luck with your decision. The Sigma is a fine lens, as you can see from the samples posted.
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